No rows should be returned, DB is empty.
I'm testing now on a empty DB trying to find out how to improve this.
In this query I have 3 joins like this:
SELECT t1.id, t2.valid_from
FROM t1
JOIN t2 ON (t1.id_t1 = t1.id)
LEFT JOIN t3 ON (t3.id_t1 = t1.id AND t3.valid_from<t2.valid_from)
WHERE t3.id IS NULL
If I delete these 3 joins than the planning time goes down from 5.482 ms to 754.708 ms but I'm not sure why this context is so demanding on the planner.
I'm tryng now to make a materialized view that will allow me to stop using the syntax above.
I reattached the same files, they should be fine like this.
------ Original Message ------
From: "Fırat Güleç" <firat.gulec@xxxxxxxxxxxx>
To: "Sterpu Victor" <victor@xxxxxxxx>
Sent: 2019-11-22 1:35:15 PM
Subject: RE: Postgresql planning time too high
Hello Sterpu,
First, please run vaccum for your Postgresql DB.
No rows returned from your query. Could you double check your query criteria.
After that could you send explain analyze again .
Regards,
FIRAT GÜLEÇ
Infrastructure & Database Operations Manager
firat.gulec@xxxxxxxxxxxx
M: 0 532 210 57 18
İnönü Mh. Mimar Sinan Cd. No:3 Güzeller Org.San.Bölg. GEBZE / KOCAELİ
From: Sterpu Victor <victor@xxxxxxxx>
Sent: Friday, November 22, 2019 2:21 PM
To: pgsql-performance@xxxxxxxxxxxxxxxxxxxx
Subject: Postgresql planning time too high
Hello
I'm on a PostgreSQL 12.1 and I just restored a database from a backup.
When I run a query I get a big execution time: 5.482 ms
After running EXPLAIN ANALYZE I can see that the "Planning Time: 5165.742 ms" and the "Execution Time: 6.244 ms".
The database is new(no need to vacuum) and i'm the only one connected to it. I use a single partition on the harddrive.
I also tried this on a postgresql 9.5 and the result was the same.
I'm not sure what to do to improve this situation.
The query and the explain is attached.
Thank you
"Limit (cost=67.86..67.87 rows=1 width=3972) (actual time=0.033..0.033 rows=0 loops=1)" " -> Sort (cost=67.86..67.87 rows=1 width=3972) (actual time=0.032..0.032 rows=0 loops=1)" " Sort Key: j1031101.validfrom DESC" " Sort Method: quicksort Memory: 25kB" " -> Nested Loop Left Join (cost=9.12..67.85 rows=1 width=3972) (actual time=0.022..0.022 rows=0 loops=1)" " Join Filter: (j1034965.id = j1031074.id_persontype)" " -> Nested Loop Left Join (cost=9.12..66.71 rows=1 width=3940) (actual time=0.022..0.022 rows=0 loops=1)" " -> Nested Loop Left Join (cost=8.98..66.14 rows=1 width=3936) (actual time=0.021..0.021 rows=0 loops=1)" " -> Nested Loop Left Join (cost=8.84..64.50 rows=1 width=3932) (actual time=0.021..0.021 rows=0 loops=1)" " Join Filter: (j1033358.id = j1031074.id_drg_tip_cetatenie)" " -> Nested Loop Left Join (cost=8.84..63.41 rows=1 width=3900) (actual time=0.021..0.021 rows=0 loops=1)" " -> Nested Loop Left Join (cost=8.70..62.84 rows=1 width=3384) (actual time=0.021..0.021 rows=0 loops=1)" " -> Nested Loop Left Join (cost=8.55..62.14 rows=1 width=3277) (actual time=0.021..0.021 rows=0 loops=1)" " -> Nested Loop Left Join (cost=8.40..60.49 rows=1 width=3270) (actual time=0.021..0.021 rows=0 loops=1)" " Join Filter: (j1031737.id = j1031074.id_focg_stare_externare)" " -> Nested Loop Left Join (cost=8.40..59.38 rows=1 width=3238) (actual time=0.021..0.021 rows=0 loops=1)" " Join Filter: (j1031736.id = j1031074.id_focg_tip_externare)" " -> Nested Loop Left Join (cost=8.40..58.29 rows=1 width=3206) (actual time=0.020..0.020 rows=0 loops=1)" " Join Filter: (j1031100.id = j1031074.id_exceptie_bilet_internare)" " -> Nested Loop Left Join (cost=8.40..57.09 rows=1 width=3174) (actual time=0.020..0.020 rows=0 loops=1)" " -> Nested Loop Left Join (cost=8.27..56.53 rows=1 width=3142) (actual time=0.019..0.019 rows=0 loops=1)" " Join Filter: (j1031098.id = j1031074.id_focg_contract_modes)" " -> Nested Loop Left Join (cost=8.27..55.46 rows=1 width=3110) (actual time=0.019..0.019 rows=0 loops=1)" " -> Nested Loop Left Join (cost=8.13..54.89 rows=1 width=3078) (actual time=0.019..0.019 rows=0 loops=1)" " -> Nested Loop Left Join (cost=7.99..54.33 rows=1 width=3050) (actual time=0.019..0.019 rows=0 loops=1)" " -> Nested Loop Left Join (cost=7.71..51.35 rows=1 width=3011) (actual time=0.019..0.019 rows=0 loops=1)" " Join Filter: (j1031095.id = j1031074.id_focg_sursa_internare)" " -> Nested Loop Left Join (cost=7.71..50.26 rows=1 width=2979) (actual time=0.019..0.019 rows=0 loops=1)" " Join Filter: (j1031094.id = j1031074.id_cnp_mama)" " -> Nested Loop Left Join (cost=7.71..49.24 rows=1 width=2969) (actual time=0.019..0.019 rows=0 loops=1)" " -> Nested Loop Left Join (cost=7.57..47.61 rows=1 width=2969) (actual time=0.019..0.019 rows=0 loops=1)" " Join Filter: (j1031091.id = j1031074.id_focg_internat_prin)" " -> Nested Loop Left Join (cost=7.57..46.52 rows=1 width=2937) (actual time=0.019..0.019 rows=0 loops=1)" " -> Nested Loop Left Join (cost=7.44..45.96 rows=1 width=2425) (actual time=0.018..0.018 rows=0 loops=1)" " -> Nested Loop Left Join (cost=7.31..45.40 rows=1 width=2397) (actual time=0.018..0.018 rows=0 loops=1)" " -> Nested Loop Left Join (cost=7.17..44.84 rows=1 width=1881) (actual time=0.017..0.017 rows=0 loops=1)" " -> Nested Loop Left Join (cost=7.02..43.19 rows=1 width=1874) (actual time=0.017..0.017 rows=0 loops=1)" " -> Nested Loop Left Join (cost=6.87..41.54 rows=1 width=1867) (actual time=0.017..0.017 rows=0 loops=1)" " -> Nested Loop Left Join (cost=6.73..40.98 rows=1 width=1839) (actual time=0.017..0.017 rows=0 loops=1)" " -> Nested Loop Left Join (cost=6.59..40.41 rows=1 width=1811) (actual time=0.017..0.017 rows=0 loops=1)" " Join Filter: (j1031079.id = j1031074.idensuredstatus)" " -> Nested Loop Left Join (cost=6.59..39.30 rows=1 width=1299) (actual time=0.017..0.017 rows=0 loops=1)" " -> Nested Loop Left Join (cost=6.46..38.74 rows=1 width=1271) (actual time=0.017..0.017 rows=0 loops=1)" " -> Nested Loop Left Join (cost=6.32..38.17 rows=1 width=1243) (actual time=0.017..0.017 rows=0 loops=1)" " -> Nested Loop Left Join (cost=6.19..37.62 rows=1 width=731) (actual time=0.016..0.016 rows=0 loops=1)" " Join Filter: (j1031076.id = j1031075.idsex)" " -> Nested Loop Left Join (cost=6.19..36.53 rows=1 width=219) (actual time=0.015..0.015 rows=0 loops=1)" " -> Nested Loop Left Join (cost=6.07..35.97 rows=1 width=186) (actual time=0.015..0.015 rows=0 loops=1)" " Join Filter: (j1033360.validfrom > j1033359.validfrom)" " Filter: (j1033360.id IS NULL)" " -> Nested Loop (cost=5.91..34.33 rows=1 width=198) (actual time=0.015..0.015 rows=0 loops=1)" " -> Nested Loop (cost=5.79..34.00 rows=2 width=182) (actual time=0.015..0.015 rows=0 loops=1)" " Join Filter: (j1031074.id = j1033359.idfocg)" " -> Nested Loop Left Join (cost=5.64..33.79 rows=1 width=166) (actual time=0.015..0.015 rows=0 loops=1)" " Join Filter: (j1031102.validfrom < j1031101.validfrom)" " Filter: (j1031102.id IS NULL)" " -> Nested Loop Left Join (cost=5.48..32.14 rows=1 width=166) (actual time=0.015..0.015 rows=0 loops=1)" " -> Nested Loop Left Join (cost=5.35..31.98 rows=1 width=168) (actual time=0.015..0.015 rows=0 loops=1)" " -> Nested Loop Left Join (cost=5.06..30.94 rows=1 width=168) (actual time=0.015..0.015 rows=0 loops=1)" " -> Nested Loop Anti Join (cost=4.91..29.30 rows=1 width=168) (actual time=0.015..0.015 rows=0 loops=1)" " Join Filter: (j1037912.id < j1037911.id)" " -> Nested Loop Left Join (cost=4.76..26.16 rows=1 width=168) (actual time=0.013..0.013 rows=0 loops=1)" " -> Nested Loop (cost=4.61..24.51 rows=1 width=164) (actual time=0.013..0.013 rows=0 loops=1)" " -> Nested Loop (cost=4.47..16.40 rows=41 width=32) (actual time=0.013..0.013 rows=0 loops=1)" " -> Seq Scan on department j1033386 (cost=0.00..1.01 rows=1 width=24) (actual time=0.005..0.005 rows=1 loops=1)" " -> Bitmap Heap Scan on focgdepartment j1031101 (cost=4.47..14.98 rows=41 width=16) (actual time=0.006..0.006 rows=0 loops=1)" " Recheck Cond: (iddepartment = j1033386.id)" " -> Bitmap Index Scan on foszdepartment_simple_index10 (cost=0.00..4.46 rows=41 width=0) (actual time=0.004..0.004 rows=0 loops=1)" " Index Cond: (iddepartment = j1033386.id)" " -> Index Scan using fosz_pkey on focg j1031074 (cost=0.14..0.19 rows=1 width=140) (never executed)" " Index Cond: (id = j1031101.idfocg)" " Filter: (id_stari_spitalizari = 1)" " -> Index Scan using focg_procedures_uni on focg_procedures j1037911 (cost=0.15..1.64 rows=1 width=8) (never executed)" " Index Cond: ((id_focg = j1031074.id) AND (este_ic_principala = 1))" " -> Index Scan using focg_procedures_uni on focg_procedures j1037912 (cost=0.15..1.64 rows=1 width=8) (never executed)" " Index Cond: ((id_focg = j1031074.id) AND (este_ic_principala = 1))" " -> Index Scan using address_pkey on address j1037908 (cost=0.15..1.64 rows=1 width=8) (never executed)" " Index Cond: (id = j1031074.id_address_domiciliu)" " -> Index Scan using city_pkey on city j1037909 (cost=0.29..1.02 rows=1 width=8) (never executed)" " Index Cond: (id = j1037908.idcity)" " -> Index Scan using citytype_pkey on citytype j1037910 (cost=0.14..0.15 rows=1 width=6) (never executed)" " Index Cond: (id = j1037909.citytype)" " -> Index Scan using focgdepartment_uni2 on focgdepartment j1031102 (cost=0.15..1.64 rows=1 width=16) (never executed)" " Index Cond: (idfocg = j1031074.id)" " -> Index Scan using focgdepartment_uni2 on focgdepartment j1033359 (cost=0.15..0.20 rows=1 width=24) (never executed)" " Index Cond: (idfocg = j1031101.idfocg)" " -> Index Scan using department_pkey on department j1033387 (cost=0.12..0.15 rows=1 width=24) (never executed)" " Index Cond: (id = j1033359.iddepartment)" " -> Index Scan using focgdepartment_uni2 on focgdepartment j1033360 (cost=0.15..1.64 rows=1 width=16) (never executed)" " Index Cond: (idfocg = j1031074.id)" " -> Index Scan using person_pkey on person j1031075 (cost=0.12..0.54 rows=1 width=41) (never executed)" " Index Cond: (id = j1031074.idpatient)" " -> Seq Scan on sex j1031076 (cost=0.00..1.04 rows=4 width=520) (never executed)" " -> Index Scan using ensuredstatustype_pkey on ensuredstatustype j1031078 (cost=0.13..0.55 rows=1 width=520) (never executed)" " Index Cond: (id = j1031074.idensuredstatustype)" " -> Index Scan using foszinterntype_pkey on focginterntype j1031082 (cost=0.14..0.55 rows=1 width=36) (never executed)" " Index Cond: (id = j1031074.id_focg_tip_internare)" " -> Index Scan using foszinterncrit_pkey on focginterncrit j1031083 (cost=0.14..0.55 rows=1 width=36) (never executed)" " Index Cond: (id = j1031074.id_focg_criteriu_internare)" " -> Seq Scan on ensuredstatus j1031079 (cost=0.00..1.05 rows=5 width=520) (never executed)" " -> Index Scan using org_units_pkey on org_units j1031080 (cost=0.14..0.56 rows=1 width=36) (never executed)" " Index Cond: (id = j1031074.id_org_unit)" " -> Index Scan using personstate_pkey on personstate j1031081 (cost=0.14..0.55 rows=1 width=36) (never executed)" " Index Cond: (id = j1031074.id_categorie_asigurat)" " -> Index Scan using physicians_pkey on physicians j1031084 (cost=0.15..1.64 rows=1 width=15) (never executed)" " Index Cond: (id = j1031074.idphysiciancurrent)" " -> Index Scan using physicians_pkey on physicians j1031087 (cost=0.15..1.64 rows=1 width=11) (never executed)" " Index Cond: (id = j1031074.idphysician_madeby)" " -> Index Scan using proffession_pkey on proffession j1031088 (cost=0.13..0.55 rows=1 width=520) (never executed)" " Index Cond: (id = j1031074.idproffesion)" " -> Index Scan using focg_situatii_speciale_pkey on focg_situatii_speciale j1031090 (cost=0.13..0.55 rows=1 width=36) (never executed)" " Index Cond: (id = j1031074.id_focg_situatii_speciale)" " -> Index Scan using educationlevel_pkey on educationlevel j1031089 (cost=0.14..0.55 rows=1 width=520) (never executed)" " Index Cond: (id = j1031074.id_education_level)" " -> Seq Scan on focg_internat_prin j1031091 (cost=0.00..1.04 rows=4 width=36) (never executed)" " -> Index Scan using fosz_pkey on focg j1031093 (cost=0.14..1.62 rows=1 width=8) (never executed)" " Index Cond: (id = j1031074.id_focg)" " -> Seq Scan on person j1031094 (cost=0.00..1.01 rows=1 width=18) (never executed)" " -> Seq Scan on focg_sursa_internare j1031095 (cost=0.00..1.04 rows=4 width=36) (never executed)" " -> Index Scan using icd10_pkey on icd10 j1031097 (cost=0.28..2.96 rows=1 width=43) (never executed)" " Index Cond: (id = j1031074.id_icd10)" " -> Index Scan using formulare_europene_pkey on formulare_europene j1031092 (cost=0.14..0.55 rows=1 width=36) (never executed)" " Index Cond: (id = j1031074.id_formulare_europene)" " -> Index Scan using diseasecategory_pkey on diseasecategory j1031096 (cost=0.14..0.56 rows=1 width=36) (never executed)" " Index Cond: (id = j1031074.id_diseasecategory)" " -> Seq Scan on focg_contract_modes j1031098 (cost=0.00..1.03 rows=3 width=36) (never executed)" " -> Index Scan using focg_criterii_urgenta_pkey on focg_criterii_urgenta j1031099 (cost=0.14..0.55 rows=1 width=36) (never executed)" " Index Cond: (id = j1031074.id_focg_criterii_urgenta)" " -> Seq Scan on exceptie_bilet_internare j1031100 (cost=0.00..1.09 rows=9 width=36) (never executed)" " -> Seq Scan on focg_tip_externare j1031736 (cost=0.00..1.04 rows=4 width=36) (never executed)" " -> Seq Scan on focg_stare_externare j1031737 (cost=0.00..1.05 rows=5 width=36) (never executed)" " -> Index Scan using physicians_pkey on physicians j1033295 (cost=0.15..1.64 rows=1 width=11) (never executed)" " Index Cond: (id = j1031074.idphysician_surgeon)" " -> Index Scan using hospital_release_statuses_pkey on hospital_release_statuses j1033299 (cost=0.14..0.69 rows=1 width=111) (never executed)" " Index Cond: (id = j1031074.id_hospital_release_statuses)" " -> Index Scan using citizenship_pkey on citizenship j1033304 (cost=0.14..0.56 rows=1 width=520) (never executed)" " Index Cond: (id = j1031074.id_citizenship)" " -> Seq Scan on drg_tip_cetatenie j1033358 (cost=0.00..1.04 rows=4 width=36) (never executed)" " -> Index Scan using fupu_pkey on fupu j1034618 (cost=0.14..1.63 rows=1 width=8) (never executed)" " Index Cond: (id = j1031074.id_fupu)" " -> Index Scan using country_pkey on country j1034962 (cost=0.14..0.56 rows=1 width=8) (never executed)" " Index Cond: (id = j1031074.id_country)" " -> Seq Scan on persontype j1034965 (cost=0.00..1.06 rows=6 width=36) (never executed)" "Planning time: 3769.727 ms" "Execution time: 1.494 ms"
Attachment:
query.sql
Description: Binary data
